Lubricating mechanism



H. B. HALVORSEN. LUBRICAT'ING MECHANISM.

APPLICATION HLED AUG. 2. I 920.

JPtented May 23, 1922.

v //M////////////////4/j/ il/I i dasm HALBJERT JB. HALVORSN, OF CHICAGO, ILJLINOIS, ASSIGNOR TO S'ULJLIVAN MACHIN i :BEY COMPANY, A CORPORATION 015' MASSACH'USETTS.

Specification of Letters Patent.

Patented May 23, 1922.

original application filed October 30, 1918, Serial No. 260306. Divide& and. this application filed August -2, 1920. Serial No. mofile.

v To allwhom't may concem:

lBe it known that I, HALBERT B. IiALVOIb.

SEN, a citizen of the United States, residing at Chicago, in the County ot' Cook and State ot Tllinois, have invented certain new and useful lmprovenents in Lubricating Mechanism, of which the following is a fulh clear and exact specification.

This nvention relates to lub'icating mechanism for air and other gas compressors, and especially to mechanism for supplying lubricant to the cylinders of such compressors, although applicable` if desired, to lubricators for other partsof the compressor mechanism. i

l[n the use ot' compressors of the character reterred to, particularly in the case of large units or systems, t is customary to provide means for unloading the compressor at intervals to interrupt the compressing action thereof without stopping the actuating Inotor or the compressor itself, said unloading means usually being controlledby the receiver pressure, whereby when said pressure reaches a predetermined maximum the compressor will be rendered temporarily inoperative, and when said receiver pressure falls below a predetermined ninimum the compressor will be again rendered operative, thereby automatically maintaining the receiver pressure between predetermined limits. Such com ressors are usually provided with means or supplying lubricant to the cylinder or cylinders thereof, and it is found that when the compressor is running idly during the unloaded periods a less quantity of lubricant is necessary than when the compressor is running loaded. The present.

invention has for its general object to pro'- vide means Whereby the quantity of lubricant supplied will be automatically controlled in accordance with the loaded orun-' loaded condition of the compressor, the supply being decreased or discontinued entirely when the compressor is unloaded, thereby resulting in a greater' economy in the use of lubricant, anddecreasing the difliculties due -to the presence of e'xcess lubricant inthe shown for purposes of illustration one embodiment which my invention may assume n practice.

In these lrawings,-

Fig. 1 is a side elevation of a compressor equipped with apparatus constructed in ao coi-dance with the invention.

Fig. 2 is an enlarged detail sectional View ot' a portion of the force feed lubricator.

Fig. 3 is a view similar to Fig. 2 showing certain parts in a different position.

In the illustrative embodiment of my in vention I have shown it applied to an angle compound compressor of a well known type, the same comprising a low pressure cylinder 10 having an inlet 11 and a high pressure cylinder 12 having a discharge conduit 13, said cylinders having interposed between them an intercoo'ler 14 and being provided with pistons (not shown) operativelyconnectedto a common crank shaft 15 provided with a flywheel or driving pulley 16. 4

As illustrative of means for unloading the compressor there is' herein shown an unloading valve 17 for controlling the flow of air through the inlet 11 to the low pressure cylinder 10, said unloading valve being preferably controlled through suitable means (not shown) by the receiver pressureor the pressure at the discharge side of the compressor. The details of the unloading valve and the means for controlling the same are not shown and will not be described herein, assuch devices are well 'known in the art,

may be of any usual or well known type, and

specifically form no portion of the present invention.

Compressors of the type herein shown are ing lubricant to the bearings and to the cylinders respectively. As illustrative of such a system, there is' herein indicated at 18 a lubricant forcing device for supplying lu-.

bricant to the bearings, and a second lubricant forcing device 19 for supplying oil to the cylinders, the device 18 being actuated by a level' 20 connected by a link 21 with a crank disk 22 on the crank shaft 15, and the device 19 being provided with an Operating arm 23 connected by a rod 2 1 with the lever 20.' The lubricator 18 forms no portion of the present invention and may be of any usual or well known type. Simlarly, the

ioo

' well known McCord force feed type, such as is usually connected by the customary check valved oilpipes 19' withthe compressor cylinders and which is sufiicently well known not to require description in detail. For the purpose of the present description, it will be suflicient to say that. said lubricator comprises a casing 25 (Fig. 2) containing suitable lubricant forcing and distributing means actuated from a shaft 26 provided with a ratchet -wheel 27 controlled by aholdin pawl 28 and actua'ted by an Operating paw 29 carried by a swinging pawl carrier 30 actuated by the arm 23, whereby as said arm is oscillated by the rod 24 the shaft 26 will be intermittently rotated, thereby actuatingthe lubricant forcing devices.

In this illustratve form of my invention the operation of the' lubricant forcin de vices of the lubricator 19 is controlle or rendered operative or inoperative in accord ance with the loaded or unloaded condition of the compressor, by controlling the engagement of the Operating paw1`29- with the ratchet wheel 27 through suitable connections with the unloading valve 17. To this end, the pawl 29 is provided with a finger -31 which is engaged by a cam 32 pivoted s at 33 on a bracket 34 in the casing 25, said cam being oscillated by an arm 35 connected by a rod 36 with one arm of a bell crank lever 37 fulcrumed on the casing of the unloading valve 17 and having its other arm engaged,by a shoulder or collar 38 on the unloading valve stern 39. When the unloading valve is open, the cam 32 is normally held ,in inoperative position out of engagement with the finger 31, as shown in Fig. 2, by means of a spring 40 interposed between the wall of the casing 25 and a collar 41 on the rod 36, the movement of said rod under the influence of said spring being preferably limited by a second collar 42 on-said rod adapted to engage said casing wall.

In operation, when the unloadng valve s closed to unload ,the compressor, downward i movement of the valve stem 39 will cause the -thepawl 297 out of engagement with the ratchet 27, thereby rendering theoperating connections to the lubricator 19 inoperative and. suspending theoperation of'the lubricant forcing devices thereof. When the unloading valve is' again opened to load the compressor, causing the collar 38' to release the lever'37, the spring 40 moves the rod 36 toward the left into the position 'shown in to disengage the finger 31, and permitting the pawl 29 to re-engage the ratchet 27, thereby-re-establishing the Operating connection to the lubricator 19 and causing said lubricator to operate in the usual manner.

This application is a division of my covpending application Serial No. 260,306, filed October 30, 191'8. i

' While I have in this application specifically described one form which my invention may assume in practice, it will be unde'stood that this form of the same is shown 'for purposes of illustration and that the invention may be modified and embodied in other forms without departing from its spirit or the scope of the appended claims.

What I claim as new and desire to secure by Letters Patent isz 1. The combination with a compressor and unloading means therefor, of lubricating' means for said compressor controlled by said unloading means.

- 2. The combination with a compressor having an unloading valve, of lubricating means for said compressor 'controlled by opening and closing of said unloading valve.

3. The combination with a comprcssor and unloading means therefor, of lubricating means for said compressor, and means controlled by said unloading means for Varying the operation of said lubricating means.

4. The combination with a compressor having an unloading valve, of lubricating means for said compressor, and means controlled by opening and closng ot' said unloading valve for varying the operation of' said lubricating means.

5. The combination with a compressor having a cylinder-of unloading means for said compressor, and means controlled by said unloading means for supplying lubricant to said cylinder.

6. The combination with a compressor having a cylinder and an unloading valve, of means controlled by opening and closing of said unloading valve for supplying lubricant to said cylinder.

7. The combination with a comprcssor and unloading means therefor, of lubricating means for said compressor rendered operative or inoperative by operation of said unloading means. 8. The combination with a compressorhaving an unloading valve, of lubricating means for said co'mpressor rendered operative 'or inoperative by opening or closing of said unloading valve.

9. The combination with a compressor, of lubricating means therefor, and means :tor actuating said lubricating means including an operative connection rendered effective bythe loading of said compressor.

10. The combination with a compressor,

Fi 2, turnin'g the cam 32 into the po sition of a force -feed lubricator therefor, and

13. The combinaton With a compressor having a cylinder, of means for supplying lubricant to said cylinder, and means for actuating said lubrcant supplying means including a connection rendered operative or inoperative upon the loading or unloading of said compressor.

14. In combination with a compressor having unloading means, a lubrcant pump, an actuating member for said pump, and a connection between said actuating member and a moving part of said compressor adapted to be interrupted upon unloading of said compressor. i

15. In combination with a compressor having unloading means. a lubricant pumping means, a connection between said lubricant pumping means and amoving part of said compressor, and means to interrupt said connection upon unloading said compressor.

16, In combination with a compressor having unloading means, a member actuated by a movng part of said compressor, a lubricant pump `connected thereto and 'driven thereby, and means for, interrupting said driving connection upon unloading of the compressor.

17. In combination with a compressor having unloading means, an oil pump having a ratchet and pawl drive, and means for interrupting said drive upon unloading of said compressor.

18. In combination with a compressor having unloading means, an oil pump having a ratchet and pawl drive, and means for preventing operation of said pawl upon unloading of said compressor.

19. In combination With a compressor having unloading means, an oil pump having a ratchet and' pawldrive. and means to prevent driving said ratchet by* said pawl upon unloading of said compressor.

20. In combination with a compressor having unloading means, an oil pump having an ntermittent drive, and means for rendering said drive inefiective upon unloading of said compressor.

21. The combination with a compressor and unloading means therefor, o' 'lubricant pu mping means for said compressor, and means for interrupting the pumping action of said pumping means upon unloading of the compressor.

22. The -combination with a compressor and unloading means therefor, of alubricant pump, pump driving means having an operative connection With said lubricant pump, and means for' interrupting the con nection between said ump and pump driving means upon un oading of the com- 23. The combination with a co mpressor,`

of lubricating means therefor, means for ac- .tuating` said lubricating means including a actuating means when said compressor is unloaded.

In testimony whereof I affix my signature.

HALBERT lB. HALVORSEN. 

